- Extremely airtight! The Butyl rubber compound prevents pressure loss and fewer occassions to inflate. Extremely reliable! Quality control for safer cycling: Each tube is checked twice at the factory to ensure safer cycling. Having the correct pressure means fewer punctures and reduced rolling resistance.
Schwalbe AV19 - 28 x 1.90/2.35" (650B) (29-ER) (50/60-222) - Schrader - 40mm